Exiting from the hotel lobby, they bo in a cafÚ near there (which is indeed not far), the Corbeau, at the next street corner:http://g.co/maps/j732v
(I go there from time to time with friends, so it was easy to recognize )

This is near the university of Brussels (ULB) :http://g.co/maps/v46sv
The scene with the bus was right there too
Then they walk to a subway station which seems nearby...http://g.co/maps/g3mdu
but in reality it is a few kilometres away